119165-68-3Relevant articles and documents
Switching the Spin-Crossover Phenomenon by Ligand Design on Imidazole-Diazineiron(II) Complexes
Bibi, Naheed,De Arruda, Eduardo Guimaraes Ratier,Domingo, Alex,Oliveira, Aline Alves,Galuppo, Carolina,Phung, Quan Manh,Orra, Naíma Mohammed,Béron, Fanny,Paesano, Andrea,Pierloot, Kristine,Formiga, André Luiz Barboza
, p. 14603 - 14616 (2018)
The iron(II) complexes of two structural isomers of 2-(1H-imidazol-2-yl)diazine reveal how ligand design can be a successful strategy to control the electronic and magnetic properties of complexes by fine-tuning their ligand field. The two isomers only differ in the position of a single diazinic nitrogen atom, having either a pyrazine (Z) or a pyrimidine (M) moiety. However, [Fe(M)3](ClO4)2 is a spin-crossover complex with a spin transition at 241 K, whereas [Fe(Z)3](ClO4)2 has a stable magnetic behavior between 2 and 300 K. This is corroborated by temperature-dependent M?ssbauer spectra showing the presence of a quintet and a singlet state in equilibrium. The temperature-dependent single-crystal X-ray diffraction results relate the spin-crossover observed in [Fe(M)3](ClO4)2 to changes in the bond distances and angles of the coordination sphere of iron(II), hinting at a stronger σ donation of ligand Z in comparison to ligand M. The UV/vis spectra of both complexes are solved by means of the multiconfigurational wave-function-based method CASPT2 and confirm their different spin multiplicities at room temperature, as observed in the M?ssbauer spectra. Calculations show larger stabilization of the singlet state in [Fe(Z)3]2+ than in [Fe(M)3]2+, stemming from the slightly stronger ligand field of the former (506 cm-1 in the singlet). This relatively weak effect is indeed capable of changing the spin multiplicity of the complexes and causes the appearance of the spin transition in the M complex.
Stabilizing volatile liquid chemicals using co-crystallization
Aaker?y, Christer B.,Wijethunga, Tharanga K.,Benton, Joshua,Desper, John
supporting information, p. 2425 - 2428 (2015/02/05)
A convenient, effective, and scalable protocol for stabilizing volatile liquid chemicals is reported. Through the use of halogen-bond driven co-crystal synthesis, several examples of liquid iodoperfluoroalkanes are transformed into crystalline materials with low-vapor pressure, considerable thermal stability, and moisture resistance. The target compounds can subsequently be re-generated through simple solvent-extractions.
Fused Aminodihydrothiazine Derivatives
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Paragraph 0196; 0197, (2014/02/15)
The present invention relates to a fused aminodihydrothiazine derivative of formula (I): wherein R is hydrogen or C1-6 alkyl, optionally substituted by one to five halogen atoms; n is 0, 1, 2 or 3; Ar is phenyl or a 5- or 6-membered heteroaromatic group containing 1, 2 or 3 N atoms, which Ar is optionally substituted by one to three substituents selected from hal, hydroxyl, —CN, C1-6alkyl, C2-3alkenyl, C2-3alkynyl,C-6alkoxy, C3-6cycloalkoxy and pyrazine, where C1-6alkyl and C1-6alkoxy are optionally substituted by one to three halogen atoms; and pharmaceutically acceptable salts thereof; which compound has an Aβ production inhibitory effect or a BACE1 inhibitory effect and is useful as a prophylactic or therapeutic agent for a neurodegenerative disease 1 caused by Aβ and typified by Alzheimer-type dementia.
FUSED AMINODIHYDROTHIAZINE DERIVATIVES
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Page/Page column 36-37, (2012/07/27)
The present invention relates to a fused aminodihydrothiazine derivative of formula (I): wherein R is hydrogen or C1 -6 alkyl,optionally substituted by one to five halogen atoms; n is 0,1,2 or 3; Ar is phenyl or a 5-or 6-membered heteroaromatic group containing 1,2 or 3 N atoms,which Ar is optionally substituted by one to three substituents selected from hal, hydroxyl,-CN,C1-6alkyl,C2-3alkenyl,C2-3alkynyl,C-6alkoxy,C3-6cycloalkoxy and pyrazine,where C1-6alkyl and C1-6alkoxy are optionally substituted by one to three halogen atoms; and pharmaceutically acceptable salts thereof; which compound has an Aβ production inhibitory effect or a BACE1 inhibitory effect and is useful as a prophylactic or therapeutic agent for a neurodegenerative disease1 caused by Aβ and typified by Alzheimer-type dementia.
PTERIDINONES AS INHIBITORS OF POLO - LIKE KINASE
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Page/Page column 107, (2011/07/09)
The present invention provides compounds having a structure according to Formula (I) or a salt or solvate thereof, wherein ring A, X, R1, R2, R3, R4, R5 and R6, are defined herein. The invention further provides pharmaceutical compositions including the compounds of the invention and methods of making and using the compounds and compositions of the invention, e.g., in the treatment and prevention of various disorders, such as Parkinson's disease.
A simple and convenient one-pot method for the preparation of heteroaryl-2-imidazoles from nitriles
Voss, Matthew E.,Beer, Catherine M.,Mitchell, Scott A.,Blomgren, Peter A.,Zhichkin, Paul E.
, p. 645 - 651 (2008/04/12)
A simple, convenient and high-yielding one-pot method for the synthesis of 2-heterocycle-substituted imidazoles from the corresponding nitriles has been developed. The procedure is easily scaleable and the workup does not involve chromatography. This synthesis is also applicable to the preparation of imidazoles with electron-poor aryl substituents.